Native Metal Collection (page 8)

Lapis lazuli from Afghanistan
Polished slab of lapis lazuli containing some brassy-coloured pyrite. Lapis lazuli (sodium calcium aluminum silicate sulphur sulphate) is a rich blue opaque, semi-precious stone

Andalusite cut stone
Andalusite is an aluminium silicate. It shows spectacular red and green pleochroic colours

Malachite cameo and malachite-chrysocolla mass. Malachite (copper carbonate hydroxide), has a distinctive green banding and belongs to the carbonate class

Belt-hook in lapis lazuli
Carved chinese belt-hook on a piece of rough lapis lazuli from Badakhstan. Lapis lazuli (sodium calcium aluminum silicate sulphur sulphate) is a rich blue opaque, semi-precious stone

Polished slab of rhodonite
A pink specimen of rhodonite (manganese iron magnesium calcium silicate). Rhodon is greek for rose

Lapis lazuli from Siberia
A polished slab of Siberian Lapis lazuli containing white calcite and some brassy pyrite. Lapis lazuli means blue rock, with the rich colour due to the sulphur in its composition

Turquoise vein in shale
Turquoise (hydrated copper aluminum phosphate) vein in shale, from Victoria, Australia. Turquoise is perhaps the most valuable non-transparent mineral

A collection of turquoise specimens
Rough, polished and worked specimens of turquoise (Hydrated Copper Aluminum Phosphate). Turquoise is perhaps the most valuable of the non-transparent minerals

Turquoise
Four different examples of worked turquoise. Turquoise (hydrated copper aluminum phosphate) is perhaps one of the most valuable non-transparent minerals

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